STAB1 and renal fibrosis: To obtain a detailed assessment of the whole-body distribution kinetics of intravenously administered bexmarilimab and its CLEVER-1–targeting ability, we radiolabeled bexmarilimab and preclinically evaluated the effects of 89Zr-DFO-bexmarilimab in healthy rabbits and rabbits with renal fibrosis induced by unilateral ureteric obstruction (UUO).